org.apache.logging.log4j.core.tools.picocli

Class CommandLine.RunFirst

java.lang.Object

org.apache.logging.log4j.core.tools.picocli.CommandLine.RunFirst

All Implemented Interfaces:

CommandLine.IParseResultHandler

Enclosing class:

CommandLine

public static class CommandLine.RunFirst
extends Object
implements CommandLine.IParseResultHandler

Command line parse result handler that prints help if requested, and otherwise executes the top-level Runnable or Callable command. For use in the parseWithHandler methods.

From picocli v2.0, RunFirst is used to implement the run and call convenience methods.

Since:

2.0

Constructor Summary

Constructors

Constructor and Description
RunFirst()

Method Summary

Modifier and Type	Method and Description
List<Object>	handleParseResult(List<CommandLine> parsedCommands, PrintStream out, CommandLine.Help.Ansi ansi) Prints help if requested, and otherwise executes the top-level Runnable or Callable command.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RunFirst

public RunFirst()

Method Detail

handleParseResult

public List<Object> handleParseResult(List<CommandLine> parsedCommands,
                                      PrintStream out,
                                      CommandLine.Help.Ansi ansi)

Prints help if requested, and otherwise executes the top-level Runnable or Callable command. If the top-level command does not implement either Runnable or Callable, a ExecutionException is thrown detailing the problem and capturing the offending CommandLine object.

Specified by:

handleParseResult in interface CommandLine.IParseResultHandler

Parameters:

parsedCommands - the CommandLine objects that resulted from successfully parsing the command line arguments

out - the PrintStream to print help to if requested

ansi - for printing help messages using ANSI styles and colors

Returns:

an empty list if help was requested, or a list containing a single element: the result of calling the Callable, or a null element if the top-level command was a Runnable

Throws:

CommandLine.ExecutionException - if a problem occurred while processing the parse results; use CommandLine.ExecutionException.getCommandLine() to get the command or subcommand where processing failed